Hi
I'm working with detached objects following the example in the docs
(http://code.google.com/appengine/docs/java/datastore/creatinggettinganddeletingdata.html#Updating_an_Object)
However, for some reason, I'm unable to update objects that have been detached.
I wrote a little test to illustrate my problem:
@PersistenceCapable(detachable = "true")
public class Pojo {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
public Key key;
@Persistent
public String property;
}
public class TestDettached {
private final LocalServiceTestHelper helper = new
LocalServiceTestHelper(new LocalDatastoreServiceTestConfig());
@Before
public void setUp() {
helper.setUp();
}
@After
public void tearDown() {
helper.tearDown();
}
@Test
public void test() {
PersistenceManagerFactory pmf =
JDOHelper.getPersistenceManagerFactory("transactions-optional");
Pojo obj = new Pojo();
obj.key = KeyFactory.createKey(Pojo.class.getSimpleName(), 1);
obj.property = "1";
PersistenceManager pm1 = pmf.getPersistenceManager();
pm1.makePersistent(obj);
pm1.close();
PersistenceManager pm2 = pmf.getPersistenceManager();
obj = pm2.getObjectById(Pojo.class,
KeyFactory.createKey(Pojo.class.getSimpleName(), 1));
obj = pm2.detachCopy(obj);
pm2.close();
Assert.assertEquals("1", obj.property);
obj.property = "2";
PersistenceManager pm3 = pmf.getPersistenceManager();
pm3.makePersistent(obj);
pm3.close();
PersistenceManager pm4 = pmf.getPersistenceManager();
obj = pm4.getObjectById(Pojo.class,
KeyFactory.createKey(Pojo.class.getSimpleName(), 1));
Assert.assertEquals("2", obj.property);
pm4.close();
}
}
This test fails in the last assert when it finds that the object in the
database have not been updated regardless of the call to makePersistent
No exceptions are thrown, the update just gets ignored.
Is this a bug or I'm missing something?
Thanks for your help,
Alex
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